GSPC's 15-well dev. plan for NELP-II block

Vol 27, PW 8 (18 Apr 24) Exploration & Production

GSPC is gearing up for a 15-well development campaign at its NELP-II (Ahmedabad) block CB-ONN-2000/1.

Expected to cost an estimated Rs180cr ($21.6m), the campaign is scheduled to begin next year (2025) once GSPC completes an Environmental Impact Assessment (EIA) report and organises a public hearing. "We received the (environment ministry) Terms of Reference on March 8 (2024)," confirms a GSPC source.

Already to hand is a 33-page Pre-Feasibility Report (PFR) prepared by Surat-based Envirocare Technocrats. In the report, Envirocare says GSPC wants to drill 15 new wells, install up to four Early Production Systems (EPS) or Quick Production Systems (QPS), an underground pipeline network of 4-inch and 6-inch diameters connecting the wells with the production facilities, a tanker offloading facility near the crude oil delivery point at ONGC's Nawagam Central Tank Farm (CTF), and other facilities.

"This project is about infill development for the optimum exploitation of oil and gas reserves and to improve recovery from the Ahmedabad block," says the PFR. Block CB-ONN-2000/1 is in Gujarat's Ahmedabad district and is divided into three fields: Ingoli, Sanand East and Balpura.

At the 14.03-sq km Ingoli, GSPC plans nine wells. Seven will be drilled near Pisawada village: PK2#DEV3, PK2#DEV4, PK2#DEV5, PK2#DEV6, PK2#DEV7, PK2#DEV8 and PK2#DEV9; and two will be drilled at Ingoli and Kauka villages: PK1#DEV10 and PK1#DEV11.

At the 5.7-sq km Sanand East field, GSPC wants to drill two wells at Ghuma village on the western outskirts of Ahmedabad: SE#DEV3 and SE#DEV4. At the 37.32-sq km Balpura field, GSPC proposes four wells: GSAH5#DEV1 at Dholka town, GSAH5#DEV2 at Balpura village, GSAH5#DEV3 at Sindhrej village and GSAH5#DEV4 at Juval Rupavati village.

In the ToR, the environment ministry advised GSPC to find an alternative location for a proposed well near Pisawada village. "GSPC should explore horizontal directional drilling if no alternative location is found," is says.

GSPC expects each well will produce 189 b/d (30 cm/d) of crude and 3000 cm/d of associated gas.

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GSPC says the development programme aims to increase production to meet growing national demand. “India imports 86.9% of its crude oil demand,” says the PFR. “Only 13.1% is produced locally; GSPC intends to enhance oil and gas production in the block by drilling and developing wells.” Drilling operations will be conducted round-the-clock but not at night if a well location is within 500 metres of a village in line with the ToR. GSPC will drill the wells to depths of up to 2000 metres. Each well will likely take 30 to 45 days. GSPC and GAIL (50:50) initially won the block in 2001 with a 1424-sq km area but later relinquished 1370.97-sq km, leaving 53.03-sq km.

GSPC's 15-well dev. plan for NELP-II block

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